KR100654289B1 - Cleaning device for a vehicular lamp - Google Patents

Abstract

An object of this invention is to make the size of the whole apparatus small in the direction orthogonal to the sliding direction of a piston.

A nozzle portion 5 having a cylinder 2 to which a cleaning liquid is supplied, a piston 3 having a cleaning liquid passage 3a therein, coupled to the cylinder so as to be slidable, and an injection hole 511 for injecting the cleaning liquid. And a spring means 24 interposed between the piston and the cylinder to apply a force in the direction of pulling the piston into the cylinder, and a check valve portion 4 interposed between the nozzle portion and the piston. The unit includes a washing liquid inlet 412a, a valve arranging unit 411, and a washing liquid outlet 413a arranged in series in the sliding direction of the piston, and the valve arranging unit has the washing liquid inlet and the washing liquid outflow. The valve body 43 which opens and closes between the parts is disposed, and at least a part of the valve body moves in a direction substantially orthogonal to the sliding direction of the piston so as to provide a clearance between the cleaning liquid inlet and the cleaning liquid outlet. Cleaning of the motor vehicle lamp configured to lung device (1).

Description

CLEANING DEVICE FOR A VEHICULAR LAMP}

FIG. 1 is a view showing a state in which a cleaning device for a vehicle lamp of the present invention is incorporated in a vehicle body, such as a headlamp, together with FIGS. 2 to 4.

2 is a plan view of the standby state.

3 is a side view of the standby state.

4 is a side view of a use state.

5 is a longitudinal sectional view showing an entire cleaning apparatus of a vehicle lamp.

6 is a plan view showing the entire cleaning apparatus of a vehicle lamp.

FIG. 7 is an enlarged cross-sectional view taken along the line VII-VII of FIG. 6.

FIG. 8 is an enlarged cross-sectional view taken along the line VIII-VIII of FIG. 5.

FIG. 9 shows a check valve part together with FIGS. 10 to 13, and this figure is a longitudinal cross-sectional view of a case body.

10 is a bottom view of the case body.

11 is an exploded perspective view of the case body.

12 is a longitudinal sectional view showing a closed state.

13 is a longitudinal sectional view showing an operating state.

14 is an enlarged longitudinal sectional view of the nozzle unit.

<Explanation of symbols for the main parts of the drawings>

1: cleaning device for a vehicle lamp 2: cylinder

24: tension spring (spring means) 3: piston

3a: inside (washing liquid passage) 4: check valve portion

411: main part (valve arrangement part) 411b: valve body accommodating recessed part

411c: pressure forming portion 411e: communication hole

412a: washing liquid inlet 413a: washing liquid outlet

421: air hole 43: valve body

431 convex 44 spring

45: plate 5: nozzle portion

511 nozzle

The present invention relates to a cleaning device for a novel vehicle lamp. Specifically, a nozzle having a cylinder to which the cleaning liquid is supplied, a piston slidably coupled to the cylinder, an injection port for injecting the cleaning liquid, and a check valve portion interposed between the nozzle portion and the piston, In a cleaning device for a vehicle lamp, which is supplied from a cylinder to a check valve via a piston, and the cleaning liquid is opened by the pressure to eject the check valve, the size of the entire apparatus is reduced in a direction orthogonal to the sliding direction of the piston. It is about technology to do.

Automotive luminaires, such as headlamps, are important functional components and must be avoided to impair their beam irradiation capability.

One of the causes of the impairment of the irradiation ability of a vehicle luminaire such as a headlamp is contamination of the front lens. For example, the muddy water splashed by one's own vehicle, a preceding vehicle, or an opposing vehicle during a rainy road or when the snow melts may fly to the front lens, thereby preventing the beam from being irradiated by the soil attached to the front lens. It may occur. Therefore, even in the case of running, it is necessary to remove dirts such as mud attached to the front lens in a timely manner.

Therefore, there is a need for a cleaning device for a vehicle lamp for cleaning dirt from dust and the like attached to the front lens by spraying the cleaning liquid onto the front lens as needed.

In the cleaning device for a vehicle lamp as described above, since the cleaning liquid is injected to the front lens, the injection port needs to be located further forward than the front lens. However, when the nozzle portion having the injection hole is located further forward than the front lens, the projection is present in the front portion of the vehicle, which is not preferable for safety reasons. Therefore, what is considered is called a pop-up type | mold, and the washing | cleaning apparatus comprised so that a nozzle part which has an injection hole is normally located in the back surface of a bumper etc., and a nozzle part protrudes ahead of a front lens when it is necessary to spray a cleaning liquid is proposed. As a cleaning apparatus for such a pop-up vehicle lamp, there is one described in Japanese Patent Laid-Open No. 8-58533.

In the cleaning apparatus described in Japanese Patent Laid-Open No. 8-58533, the cleaning liquid passage is formed in the piston, and a nozzle portion is connected to the front end thereof, and a check valve portion is provided at the rear end thereof. When not injecting, the piston is held in the pulled state by the spring means interposed between the cylinder and the piston. Then, by supplying the cleaning liquid into the cylinder, the piston gradually protrudes from the cylinder, and when the pressure of the cleaning liquid in the cylinder becomes higher than a predetermined value, the check valve portion is opened, the cleaning liquid flows into the piston, and then is injected from the injection port of the nozzle portion.

By the way, in the washing | cleaning apparatus of the luminaire for vehicles described in Unexamined-Japanese-Patent No. 8-58533, each member which comprises a check valve part is arranged in the sliding direction of a piston, and each member which comprises a check valve part is a piston. The cleaning liquid passage is configured to operate in the sliding direction of the opening. Therefore, the size of the piston in the check valve portion increases in the radial direction, and the outer diameters of the piston and the cylinder are inevitably increased. Therefore, when mounting on a vehicle, a large space is required in the height direction.

In vehicles such as automobiles, large spaces cannot be secured in the vertical direction around the headlamp due to design requirements, and there is a high demand for a cleaning device that can be installed in small spaces above and below and left and right of the headlamp. .

This invention is made | formed in view of the above-mentioned situation, and makes it a subject to reduce the size of the whole apparatus in the direction orthogonal to the sliding direction of a piston.

In order to solve the above-mentioned problem, the washing | cleaning apparatus of the vehicle luminaire of this invention WHEREIN: The check valve part is arrange | positioned between a piston and a nozzle part, The said check valve part is a washing | cleaning liquid inflow part arranged in series in the sliding direction of the said piston, A valve arrangement | positioning part and a washing | cleaning liquid outlet part are provided, The valve arrangement | positioning part is arrange | positioned the valve body which opens and closes between the said washing | cleaning liquid inflow part and the washing | cleaning liquid outflow part, At least one part of the said valve body is substantially orthogonal to the sliding direction of the said piston. It moves in the direction to make, and it opens and closes between a washing | cleaning liquid inflow part and a washing | cleaning liquid outflow part.

Therefore, in the cleaning device for a vehicle luminaire of the present invention, the valve body is disposed so that its radial direction is along the sliding direction of the piston, and when the check valve part is closed, the cleaning liquid remaining between the check valve part and the nozzle part. Small amount

EMBODIMENT OF THE INVENTION Below, the best form for implementing the washing | cleaning apparatus of the vehicle luminaire of this invention is demonstrated with reference to an accompanying drawing.

The cleaning device 1 for a vehicle luminaire includes a cylinder 2, a piston 3 slidably coupled to the cylinder 2, and a nozzle connected to the tip of the piston 3 via a check valve portion 4. The part 5 is provided.

The cylinder 2 has a substantially cylindrical main part 21 and a joint part 22 for closing the rear end of the main part 21.

A plurality of engaging projections 21a, 21a, ..., 21b, 21b, ... (see FIGS. 3 and 4) are formed at the front end and the rear end of the outer circumferential surface of the main part 21 at intervals in the circumferential direction, respectively. have. In addition, the inner side flange 21c (refer FIG. 5) which protrudes inward is formed in the front end of the main part 21. As shown in FIG.

The joint part 22 is almost annular, and the fitting part 221 whose rear end is occluded and the connecting pipe 222 which are connected to the rear end of this fitting part 221 and protruded to the side are formed integrally. In the fitting portion 221, a plurality of coupling holes 221a, 221a,... Are formed at intervals in the circumferential direction, and a spring engaging portion 221b is integrally formed inside the fitting portion 221. It is formed (see FIGS. 3 to 5).

And the fitting part 221 of the joint part 22 is externally fitted in the rear end part of the main part 21, and the engaging projection 21b, 21b, ... formed in the outer peripheral surface of the main part 21 is jointed. It engages with the engaging holes 221a, 221a, ... of the part 22, and the joint part 22 is attached to the rear end of the main part 21 by this. Moreover, the groove | channel 221c is formed in the inner surface of the rear end part of the fitting part 221 of the joint part 22 over the perimeter, and the main part (with the O-ring 23 inserted in this groove 221c) is carried out. The rear end of 21 is fitted into the groove 221c (see Fig. 5).

The piston 3 is slidably coupled to the cylinder 2. The piston 3 is formed in substantially cylindrical shape, and the engaging groove 31 is formed in the outer peripheral surface of a rear end part over the perimeter, and the flange 32 protrudes in front of this engaging groove 31. As shown in FIG. The outer diameter of the flange 32 is formed to be substantially the same as the inner diameter of the main portion 21 of the cylinder 2, and the outer circumferential surface of the flange 32 is the inner circumferential surface of the main portion 21 of the cylinder 2. Is to slide (see FIG. 5).

The front end of the piston 3 is formed with a small diameter portion 33 having a smaller outer diameter than the other portion, and a plurality of engaging projections 34, 34,... Is formed on the outer circumferential surface of the portion near the rear end of the small diameter portion 33. It is formed at intervals in the direction, and the engaging groove 35 is formed over the entire circumference at the outer circumferential surface of the position just before the engaging projections 34, 34, ... (see Fig. 5). The shape of the outer circumferential surface of the portion between immediately after the small diameter portion 33 of the piston 3 to the flange 32 is circular, other than an ellipse, an ellipse, or an ellipse, or an angle, as viewed in a cross section perpendicular to the axial direction. It is formed by continuous planes and / or curved surfaces. For example, a circle other than a circle, such as a regular polygon, an ellipse, a manor, or the like, is formed into a circle in which a part of an arc called D cut is changed into a plane. In this embodiment, it is formed in the regular hexagon (refer FIG. 8). In addition, the shape of the inner circumferential surface of the inner flange 21c formed at the front end of the cylinder 2 described above becomes a shape suitable for the shape of the outer circumferential surface of the piston 3, whereby the rotation of the piston 3 in the axial circumferential direction Is prevented. In this embodiment, the shape of the inner peripheral surface of the said inner flange 21c of the cylinder 2 is formed in the regular hexagon (refer FIG. 8).

Further, a spring engaging bar 36 is formed at the front end of the piston 3 in such a manner as to connect between the inner circumferential surfaces thereof (see FIG. 5).

In addition, the coupling groove 31 formed in the rear end of the piston 3 is fitted with a seal body 37 formed in an almost annular shape by an elastic material, and the coupling groove 35 formed in the small diameter portion 33 of the front end portion. O ring 38 is fitted. Moreover, the said seal body 37 has the V shape which cross-sectional shape laid horizontally, and the wrinkle part 37a located in the outer side is located in the outer side slightly rather than the flange 32 of the piston 3 (FIG. 5). Reference). As a result, the wrinkles 37a are in sliding contact with the inner circumferential surface of the main portion 21 of the cylinder 2.

The piston 3 is inserted into the main part 21 of the cylinder 2 from the rear end, and the rear end of the main part 21 of the cylinder 2 is then closed by the joint part 22. Then, the tension spring 24 is provided between the spring engaging portion 221b of the cylinder 2 and the spring engaging bar 36 of the piston 3. In this way, the piston 3 is slidably coupled to the cylinder 2 in the axial direction and is held in the pulled state into the cylinder 2 by the tension spring 24 (see FIG. 5). Thus, by arrange | positioning the tension spring 24 inside the piston 3, the magnitude | size of the radial direction and the axial direction of the cylinder 2 can be comprised compactly. Then, in the state where the piston 3 is pulled into the cylinder 2, the portion on the front end side slightly protrudes from the cylinder 2 forward from the portion slightly rearward from the small diameter portion 33 of the piston 3, The dust cover 25 fixed to the front end face of the main part 21 of the cylinder 2 comes into contact with the outer circumferential face of the piston 3 (see FIG. 5). In addition, the dust cover 25 is formed of a rubber-like elastic material and has an annular shape, and the shape of the inner circumference is an ellipse when viewed in a shape corresponding to the shape of the outer circumferential surface of the piston 3, that is, a cross section perpendicular to the axial direction. It is formed by a circle other than a circle, such as a manor, or a continuous plane and / or curved surface at an angle to each other.

The check valve portion 4 and the nozzle portion 5 are connected to the front end portion of the piston 3.

The check valve part 4 is formed of the case body 41, the lid | cover 42, the valve body 43, the spring 44, and the plate 45. As shown in FIG.

As can be seen from FIG. 9 and FIG. 10, the case body 41 has a cylindrical shape that is substantially flat, i.e., has a short length in the axial direction, and the main part 411 and the main part 411 serving as the valve arrangement part. Almost cylindrical connection portions 412 and 413 connected to the front and rear are formed integrally. The said main part 411 is formed so that an axial direction may extend to an up-down direction, and is divided into two parts, a valve body accommodating recessed part 411b and the pressure forming part 411c up and down by the partition wall 411a. . The pressure forming portion 411c is separated from the portion communicating with the connecting portion 413 by the semicircular partition 411d as viewed from above, and communicates with the connecting portion 412. The partition wall 411a is formed with a circular communication hole 411e located inside the partition 411d forming position, and the pressure forming part 411c and the valve body accommodating recess ( 411b) is in communication. Further, an arc-shaped outlet hole 411f located outside the partition 411d is formed in the partition wall 411a, and the valve body accommodating recess 411b and the connecting portion 413 are formed by the outlet hole 411f. Is in communication. The inner side 412a of the connecting portion 412 is a washing liquid inflow portion and communicates with the pressure forming portion 411c, and the inner side 413a of the connecting portion 413 is a washing liquid outlet portion, so that the outflow hole 411f is provided. It communicates with the valve body accommodating recessed part 411b through this.

Two coupling holes 412b and 412b are formed at the end of the connecting portion 412 on the base side of the case body 41 at equal intervals in the circumferential direction, and from the side of the front end side of the connecting portion 412. The regulating protrusions 412c and 412c protrude (see FIGS. 7 and 10).

Coupling portions 413b and 413b protruding from side to side are formed in the connecting portion 413 on the tip side, and the cleaning liquid outlet portion 413a communicates with the coupling portions 413b and 413b. In addition, coupling protrusion lines 413c and 413c extending in an annular shape are formed on the outer circumferential surfaces of the coupling parts 413b and 413b.

As can be seen from FIGS. 11 to 13, the valve body 43 is formed of a rubber-like elastic material such as synthetic rubber, for example, and is formed almost in a disk shape. In the center of the valve body 43, a convex portion 431 protruding in a dome shape is integrally formed, and a stepped convex portion 432 is formed at a position substantially corresponding to the rear surface of the convex portion 431. . And the plate 45 is provided so that the said stepped convex part 432 and its peripheral part may be covered. The plate 45 is formed by molding a material having a higher rigidity than that of the valve body 43, for example, a metal plate, by press working or the like. When forming the valve body 43, the plate 45 is formed by insert molding or the like. The plate 45 is integrated.

In particular, as can be seen in FIG. 11, the spring 44 is formed by a leaf spring material, has a circular shape, and forms arc-shaped slits 441 and 441 in a maze form from the periphery to the center. A circular hole 442 having a size for externally mounting the protrusion 451 of the center of the plate 45 is formed at the center thereof.

The cover 42 covers the valve body accommodating recess 411b, and has a plurality of air holes 421, 421,... And a convex wall 422 that extends annularly to the outer circumferential portion. .

The valve body 43 and the spring 44 are inserted in the valve body accommodating recess 411b in this order. At this time, the convex part 431 of the valve body 43 protrudes from the communication hole 411e to the pressure formation part 411c side, and the projection 451 of the plate 45 is carried out to the circular hole 442 of the spring 44. ) Is fitted. Thereafter, the lid 42 is attached to the case body 41. By attaching the lid 42 to the case body 41, the valve body accommodating recess 411b communicates with the outside air only through the air holes 421, 421,... And the valve body 43 and the spring 44. The periphery of is sandwiched between the convex wall 422 of the lid 42 and the partition wall 411a of the case body 41, and the position thereof is fixed. Then, the spring force of the spring 44 acts to apply a force in the direction of the pressure forming portion 411c to the center portion of the valve body 43 via the plate 45, whereby the communication hole 411e and the outflow hole ( 411f) is blocked. On the other hand, since the plate 45 having a higher rigidity than the valve body 43 is interposed between the spring 44 and the valve body 43, the force of the spring 44 is transmitted to the valve body 43 without loss. The communication hole 411e and the outflow hole 411f are surely closed.

As described above, since the valve body 43 is disposed so that its radial direction is along the sliding direction of the piston 3, the valve body 43 is provided so that the sliding direction of the piston 3 is almost in the front-rear direction, and the valve body 43 is provided. ) So that the diameter of the check valve portion 4 can be made small in the vertical direction, the outer diameter of the piston 3 can be reduced and the check valve portion is not provided in the piston 3. Therefore, the outer diameter of the cylinder 2 which accommodates this piston 3 can be made small, and the magnitude | size of the up-down direction of the whole apparatus can be made small, and it arrange | positions in the small space of up and down and left and right along the circumference of the luminaire for vehicles. can do.

In the above-described check valve portion 4, the base side connection portion 412 is externally attached to the small diameter portion 33 of the distal end portion of the piston 3, and the engaging projections 34, 34,... ) Is fitted into the coupling holes 412b, 412b, ... of the connecting portion 412. Thereby, the check valve part 4 is attached to the front-end | tip part of the piston 3. As shown in FIG.

In this embodiment, two nozzle parts 5 and 5 are provided. Each nozzle part 5 consists of a nozzle body 51 and the nozzle holder 52 holding this nozzle body 51.

As can be seen in FIG. 14, the nozzle body 51 has a cylindrical shape in which the upper end is closed, and an injection hole 511 opening at the side of the upper end is provided. And the engaging groove 512 extended in an annular shape is formed in the inner peripheral surface of a lower end part. The nozzle holder 52 is provided with the annular connection part 521 and the cylindrical support part 522, and the connection part 521 and the support part 522 are orthogonal to each other, and mutually communicate with each other in the axial direction. The inner circumferential surface of the connecting portion 521 is formed with an engaging groove 521a extending in an annular shape, and an engaging protrusion line 522a extending in an annular shape is formed in the outer peripheral surface of the support portion 522.

And the nozzle body 51 is attached to the support part 522 of the nozzle holder 52 from the outside, and the engagement protrusion line of the engagement groove 512 of the nozzle body 51 and the support part 522 of the nozzle holder 52 is carried out. The engagement of the 522a prevents the nozzle body 51 from falling off from the nozzle holder 52. In this way, the nozzle part 5 is formed. Since the engagement groove of the nozzle body 51 and the engagement protrusion line 522a of the support portion 522 of the nozzle holder 52 are formed in an annular shape, the nozzle body 51 is formed around the axis of the support portion 522. Can be rotated.

The nozzle body 5 formed as described above is externally mounted to the coupling part 413b formed at the connection part 413 of the check valve part 4 by the connection part 521 of the nozzle holder 52, and further comprises a nozzle holder ( The engagement groove 521a of the 52 is engaged with the engagement protrusion line 413c of the engagement portion 413b of the check valve portion 4. In this way, the nozzle body 5 is supported by the front end of the check valve 4, and fallout is prevented. In addition, since the engaging projection line 413c of the engaging groove 521a of the nozzle holder 52 and the engaging portion 413b of the check valve portion 4 is formed in an annular shape, the nozzle body 5 is connected to the engaging portion ( 413b).

As described above, by the rotation of the nozzle holder 52 with respect to the engaging portion 413b of the check valve portion 4 and the rotation of the nozzle body 51 with respect to the support portion 522 of the nozzle holder 52, The direction of the injection port 511 can be adjusted to a desired direction.

The above-described cylinder 2 is mounted to the vehicle body via the bracket 6.

As can be seen from FIGS. 5 and 6, the bracket 6 has a cylindrical support cylinder 61 having a short axial length and a support member 62 formed to extend left and right from an upper side of the support cylinder 61. And the positioning member 63 protruding obliquely upwardly backward from the support cylinder 61 and the support member 62, and the restricting portion 64 protruding forward from the lower end of the support cylinder 61 are integrally formed. It is done.

The support cylinder 61 is provided with a plurality of engaging holes 611, 611, ... at intervals in the circumferential direction. In addition, support holes 621 and 621 are formed at both left and right ends of the support member 62. In addition, the engaging member 631 protrudes and is provided in the rear end of the positioning member 63.

The regulating portion 64 is formed by integrally forming a regulating member 641 protruding forward from the lower end of the supporting cylinder 61 and a regulating arm 642 protruding upward from the front end of the regulating member 641. In addition, the regulation arm 642 has a U shape when viewed from the front, and upper ends thereof are provided with restriction grooves 642a and 642a located opposite to each other (see FIG. 7).

Then, in the standby state in which the piston 3 is pulled into the cylinder 2, the regulating member 641 is located close to the lower surface of the base portion side connection portion 412 of the check valve portion 4, and the The regulated projections 412c and 412c are located in the regulating grooves 642a and 642a (see FIG. 7), and the position of the tip portion of the piston 3 is regulated by the restricting portion 64 of the bracket 6. .

And the front end part of the cylinder 2 is mounted in the support cylinder 61 of the bracket 6 from inside, and the engaging projection 21a, 21a, ... of the cylinder 2 is a coupling hole (of the said support cylinder 61). 611, 611, ... are fitted and coupled, whereby the cylinder 2 is supported by the bracket 6. Then, the engaging member 631 of the positioning member 63 of the bracket 6 is coupled to and positioned by a positioning portion (not shown) formed in the vehicle body, and the support holes 621 and 621 of the supporting member 62 are positioned. The bolt (not shown) penetrated into () is fixed to a mounting portion (not shown) formed in the vehicle body by a nut (not shown), whereby the cylinder 2 is supported by the vehicle body.

On the other hand, the cover 7 which covers the nozzle part 5 against the front is fixed to the front end of the check valve part 4.

The cleaning device 1 of the vehicle luminaire can be arranged between the bumper 9 just under the vehicle luminaire, for example the headlamp 8. 81 is a front lens that forms the front of the headlamp 8, and the periphery of the front lens 81 is surrounded by a rim 82 for a beautiful appearance. The cover 7 is configured to form part of the rim 82. That is, in the standby position shown in FIGS. 1 to 3, the cover 7 is positioned to form part of the rim 82. As a result, the washing apparatus 1 is apparently integrated with the head lamp, and the appearance of the vehicle on which the washing apparatus 1 is mounted is improved. And only when it is necessary to clean the front lens 81, as shown in FIG. 4, the piston (so that the injection ports 511, 511 of the nozzle bodies 51, 51 are located in front of the front lens 81). 3) protrudes from the cylinder 2.

Next, operation | movement of the washing | cleaning apparatus of the said vehicle lamp is demonstrated.

In the standby state where the piston 3 is pulled into the cylinder 2, that is, the state shown in FIGS. 3, 5, and 6, the cleaning liquid supply pipe (not shown) connected to the connection pipe 222 of the cylinder 2 is removed. When the cleaning liquid is supplied into the cylinder 2 through the rear end of the piston 3 and the inner circumferential surface of the cylinder 2, the sealing body 37 is externally mounted and fixed to the rear end of the piston 2 in a watertight manner. Since it is held, the cleaning liquid passes through the interior 3a of the piston 3 and reaches the pressure forming portion 411c of the check valve portion 4. That is, the inside 3a of the piston 3 serves as a washing liquid passage.

When the cleaning liquid is filled in the cleaning liquid passage 3a, the pressure of the cleaning liquid in the cleaning liquid passage 3a increases, but the spring force of the spring 44 of the check valve portion 4 is reduced by the cylinder 2 and the piston 3. Since it is larger than the spring force of the tension spring 24 provided in between, the tension spring 24 starts extending | stretching by the pressure of the said washing | cleaning liquid. Then, the piston 3 protrudes from the cylinder 2 by the extension of the tension spring 24.

When the flange 32 of the piston 3 contacts the inner flange 21c of the cylinder 2, the projection from the cylinder 2 of the piston 3 is stopped. And when the operation | movement which the piston 3 protrudes from the cylinder 2 stops, the pressure of the washing | cleaning liquid in the piston 3 and the cylinder 2 rises further, and the pressure formation part of the check valve part 4 is carried out. In 411c, the pressure applied to the surface of the domed protrusion 431 or the like of the valve body 43 increases. When the pressure applied to the valve body 43 rises, the pressure eventually overcomes the spring force of the spring 44 so that the spring 44 and the valve body 43 bend toward the air holes 421, 421,... The communication hole 411e and the outflow hole 411f are opened (refer FIG. 13). Therefore, cleaning liquid inflow part 412a-pressure formation part 411c-communication hole 411e-valve body accommodating recessed part 411b (pressure formation part 411c side rather than valve body 43)-outflow hole 411f The flow path of the cleaning liquid leading to the washing liquid outlet portion 413a is opened, and the cleaning liquid passes through the coupling portions 413b and 413b to the nozzle portions 5 and 5.

On the other hand, since air holes 421, 421,... Are formed in the lid 42 closing the valve body accommodating recess 411b, the valve body 43 is irrespective of the behavior of the valve body 43. The space from the cover 42 to the lid 42 is maintained at normal pressure, so that the opening and closing operation of the valve body 43 in accordance with the change of the cleaning liquid pressure in the pressure forming portion 411c is smoothly performed.

In the use state shown in FIG. 4 and the like, the piston 3 is most protruded from the cylinder 2, but the piston 3 is in contact with the outer circumferential surface of the flange 32 and the inner circumferential surface of the cylinder 2. Since the part and the outer circumferential surface of the piston 3 are supported by the cylinder 2 at two positions in contact with the inner circumferential surface of the inner flange 21c of the cylinder 2, the supporting state of the piston 3 becomes stable. Moreover, even if the piston 3 may be shaken downward by any elasticity, since the regulating member 641 formed in the bracket 6 is close from the bottom near the base of the piston 3 (see FIG. 7). In addition, the downward movement of the piston 3 above a certain level is prevented by the regulating member 641.

The cleaning liquid that has reached the nozzle portions 5, 5 also flows into the nozzle bodies 51, 51 from the nozzle holders 52, 52, and finally the front lens of the headlamp 8 from the injection holes 511, 511. It is sprayed toward 81.

When the supply of the cleaning liquid stops, the cleaning liquid pressure in the pressure forming portion 411c of the check valve portion 4 decreases, so that the spring force of the spring 44 exceeds the cleaning liquid pressure in the pressure forming portion 411c. Therefore, the communication hole 411e and the outflow hole 411f are closed by the valve body 43 (refer FIG. 12). As a result, the supply of the cleaning liquid to the nozzles 5 and 5 is stopped, and the injection of the cleaning liquid from the injection ports 511 and 511 is stopped. In addition, the cleaning liquid remains between the outflow hole 411f of the check valve portion 4 and the injection holes 511 and 511, and the remaining cleaning liquid may leak from the injection holes 511 and 511. Since the distance from 411f to the injection ports 511 and 511 is short, the quantity of the washing | cleaning liquid which remains in this part is very small, and leakage of this residual washing | cleaning liquid is hardly a problem.

Further, when the pressure of the cleaning liquid in the piston 3 and the cylinder 2 is lowered, the spring force of the tension spring 24 exceeds the pressure of the cleaning liquid, and the piston 3 is driven by the tension spring 24. It is pulled into the cylinder 2, and finally, it becomes the standby state shown in FIG. 2, FIG. Moreover, also in this standby state, a use state, and the state between these two states, the inner peripheral part of the dust cover 25 provided in the front end part of the cylinder 2 is in the state which is in close contact with the outer peripheral surface of the piston 3, Therefore, dust and the like are prevented from entering between the cylinder 2 and the piston 3 between the front end of the cylinder 2 and the outer circumferential surface of the piston 3. On the other hand, if the shape of the outer peripheral surface of the piston 3 is a regular polygon, it is easy to manufacture, and if it is an ellipse or an ellipse, since there is no angle (ridgeline), adhesiveness with the inner peripheral part of the dust cover 25 becomes favorable.

In addition, the shape and the structure of each part shown in the above-mentioned embodiment all showed only the example of the specification performed when implementing this invention, and the technical scope of this invention is interpreted limitedly by these. It should not be.

The present invention can provide a washing apparatus for a vehicle lamp having a small size and a high degree of freedom in arrangement space, and is suitable for application to a vehicle in which a large arrangement space cannot be secured from the design requirements.

The cleaning device for a vehicle lamp according to the present invention includes a cylinder to which a cleaning liquid is supplied, a piston having a cleaning liquid passage therein, and a piston coupled to the cylinder so as to be slidable, a nozzle portion having a nozzle for injecting the cleaning liquid, and the piston and the cylinder. A cleaning device for a vehicle luminaire having a spring means interposed therebetween and exerting a force in a direction of pulling the piston into a cylinder, and a check valve portion interposed between the nozzle portion and the piston, wherein the check valve portion is slid of the piston. A cleaning liquid inlet, a valve arrangement, and a cleaning liquid outlet are arranged in series in the moving direction, and a valve body for opening and closing between the cleaning liquid inlet and the cleaning liquid outlet is disposed in the valve arrangement, and at least of the valve body is provided. A part moves in a direction almost perpendicular to the sliding direction of the piston, Characterized in that for opening and closing a portion between a liquid inlet and a cleaning liquid outlet.

Therefore, in the cleaning device for a vehicle luminaire of the present invention, the valve body is arranged so that its radial direction is along the sliding direction of the piston, so that the sliding direction of the piston is almost in the front-rear direction and the radial direction of the valve body. When arranged so as to be substantially horizontal, the size of the vertical direction of the whole apparatus can be made small, and it can arrange | position in small spaces of up, down, left and right along the circumference of the vehicle luminaire. In addition, since the check valve portion is disposed at the front end of the piston, i.e., just before the nozzle portion, when the injection of the cleaning liquid is stopped, the amount of the cleaning liquid remaining between the check valve portion and the nozzle portion is very small. Few things leak out of wealth.

In the invention described in claim 2, the valve arrangement portion includes a valve body accommodating recess having an air hole communicating with the washing liquid outlet portion and communicating with the outside, and a pressure forming portion communicating with the washing liquid inlet portion of the piston. Communication holes arranged in a direction substantially perpendicular to the sliding direction and communicating between the valve body accommodating portion and the pressure forming portion are formed, and the communication hole and the cleaning liquid outlet portion and the air hole are formed in the valve body accommodating recess. The valve body is accommodated so as to partition the valve body, and the valve body moves toward the air hole due to the pressure of the washing liquid raised in the pressure forming unit to communicate between the pressure forming unit and the washing liquid outlet part, so that the valve body operates smoothly.

In the invention according to claim 3, since the convex portion protruding from the communication hole toward the pressure forming portion is formed at the center of the valve body when the communication hole is closed, the area of the valve body to which the pressure of the cleaning liquid is applied. Can be increased.

In the invention according to claim 4, a spring for applying a force to the valve body in a direction of closing the communication hole is disposed in the valve body accommodating recess, and a high rigid plate is interposed between the valve body and the spring. As a result, the force of the spring is transmitted to the valve body without loss.

In the invention as set forth in claim 5, the force applied in the direction in which the spring means pulls the piston into the cylinder is weaker than the force applied to the valve body in the direction in which the spring closes the communication hole, so that the piston protrudes from the cylinder. After that, the cleaning liquid is injected. On the other hand, although the tension means is illustrated as a spring means in embodiment, the spring means in this claim and Claim 1 is not limited to a tension spring, but also includes a compression spring, and if it acts to pull a piston into a cylinder, do.

Claims (5)

A nozzle unit having a cylinder to which a cleaning liquid is supplied, a piston having a cleaning liquid passage therein and slidably coupled to the cylinder, a nozzle for injecting the cleaning liquid, and interposed between the piston and the cylinder, the piston being introduced into the cylinder. A cleaning device for a luminaire for a vehicle having a spring means for applying a force in a pulling direction and a check valve portion interposed between the nozzle portion and the piston, The check valve unit includes a washing liquid inlet, a valve arrangement unit, and a washing liquid outlet arranged in series in the sliding direction of the piston, The valve arrangement portion is provided with a valve body for opening and closing between the cleaning liquid inlet and the cleaning liquid outlet, At least a portion of the valve body moves in a direction substantially orthogonal to the sliding direction of the piston to open and close the cleaning liquid inlet and the cleaning liquid outlet. The valve arrangement portion according to claim 1, wherein the valve arrangement portion has a valve body accommodating recess having an air hole communicating with the washing liquid outlet portion and communicating with the outside, and a pressure forming portion communicating with the washing liquid inlet portion, in the sliding direction of the piston. It is arranged in the direction orthogonal to the and is formed, the communication hole for communicating between the valve body accommodating recess and the pressure forming portion, In the valve body accommodating portion, a valve body is accommodated so as to partition between the communication hole and the cleaning liquid outlet portion and the air hole. And the valve body moves toward the air hole due to the pressure of the cleaning liquid that has risen in the pressure forming portion to communicate between the pressure forming portion and the cleaning liquid outlet. The cleaning device for a vehicle lamp according to claim 2, wherein a convex portion protruding from the communication hole toward the pressure forming portion when the communication hole is in a closed state is formed in a central portion of the valve body. The spring according to claim 2 or 3, wherein a spring for applying a force to the valve body in a direction of closing the communication hole is disposed in the valve body accommodating recess, and a high rigid plate is interposed between the valve body and the spring. The washing | cleaning apparatus of the luminaire for vehicles characterized by the above-mentioned. 5. The cleaning device for a luminaire according to claim 4, wherein the force applied in the direction in which the spring means pulls the piston into the cylinder is weaker than the force applied to the valve body in the direction in which the spring closes the communication hole.

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